61066753731 has 24 divisors (see below), whose sum is σ = 88446103200. Its totient is φ = 40601181696.

The previous prime is 61066753687. The next prime is 61066753747. The reversal of 61066753731 is 13735766016.

61066753731 is a `hidden beast` number, since 6 + 106 + 6 + 7 + 537 + 3 + 1 = 666.

It is not a de Polignac number, because 61066753731 - 2⁷ = 61066753603 is a prime.

It is a super-2 number, since 2×61066753731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61066753831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7678345 + ... + 7686293.

It is an arithmetic number, because the mean of its divisors is an integer number (3685254300).

Almost surely, 2^61066753731 is an apocalyptic number.

61066753731 is a deficient number, since it is larger than the sum of its proper divisors (27379349469).

61066753731 is a wasteful number, since it uses less digits than its factorization.

61066753731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155 (or 10152 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

The spelling of 61066753731 in words is "sixty-one billion, sixty-six million, seven hundred fifty-three thousand, seven hundred thirty-one".