146666247 has 32 divisors (see below), whose sum is σ = 242199552. Its totient is φ = 76875264.

The previous prime is 146666243. The next prime is 146666251. The reversal of 146666247 is 742666641.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (146666243) and next prime (146666251).

It is not a de Polignac number, because 146666247 - 2² = 146666243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 146666199 and 146666208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146666243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43983 + ... + 47199.

It is an arithmetic number, because the mean of its divisors is an integer number (7568736).

Almost surely, 2^146666247 is an apocalyptic number.

146666247 is a deficient number, since it is larger than the sum of its proper divisors (95533305).

146666247 is a wasteful number, since it uses less digits than its factorization.

146666247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407.

The product of its digits is 290304, while the sum is 42.

The square root of 146666247 is about 12110.5840899603. The cubic root of 146666247 is about 527.3634899038.

The spelling of 146666247 in words is "one hundred forty-six million, six hundred sixty-six thousand, two hundred forty-seven".