66437430031 has 6 divisors (see below), whose sum is σ = 77284357440. Its totient is φ = 56946368556.

The previous prime is 66437430019. The next prime is 66437430041. The reversal of 66437430031 is 13003473466.

It is not a de Polignac number, because 66437430031 - 2²¹ = 66435332879 is a prime.

It is a super-2 number, since 2×66437430031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66437430041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677932911 + ... + 677933008.

It is an arithmetic number, because the mean of its divisors is an integer number (12880726240).

Almost surely, 2^66437430031 is an apocalyptic number.

66437430031 is a deficient number, since it is larger than the sum of its proper divisors (10846927409).

66437430031 is a wasteful number, since it uses less digits than its factorization.

66437430031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355865933 (or 1355865926 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 37.

The spelling of 66437430031 in words is "sixty-six billion, four hundred thirty-seven million, four hundred thirty thousand, thirty-one".