67299979057 has 8 divisors (see below), whose sum is σ = 69640569000. Its totient is φ = 64960715904.

The previous prime is 67299979027. The next prime is 67299979067. The reversal of 67299979057 is 75097999276.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 19847456161 + 47452522896 = 140881^2 + 217836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67299979057 - 2⁷ = 67299978929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67299979007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227932 + ... + 431917.

It is an arithmetic number, because the mean of its divisors is an integer number (8705071125).

Almost surely, 2^67299979057 is an apocalyptic number.

It is an amenable number.

67299979057 is a deficient number, since it is larger than the sum of its proper divisors (2340589943).

67299979057 is a wasteful number, since it uses less digits than its factorization.

67299979057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663395.

The product of its (nonzero) digits is 135025380, while the sum is 70.

The spelling of 67299979057 in words is "sixty-seven billion, two hundred ninety-nine million, nine hundred seventy-nine thousand, fifty-seven".