66437738404131 has 16 divisors (see below), whose sum is σ = 93093566829824. Its totient is φ = 42092545761504.

The previous prime is 66437738404073. The next prime is 66437738404133. The reversal of 66437738404131 is 13140483773466.

It is not a de Polignac number, because 66437738404131 - 2¹⁷ = 66437738273059 is a prime.

It is a super-2 number, since 2×66437738404131² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66437738404133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6959741551 + ... + 6959751096.

It is an arithmetic number, because the mean of its divisors is an integer number (5818347926864).

Almost surely, 2^{66437738404131} is an apocalyptic number.

66437738404131 is a deficient number, since it is larger than the sum of its proper divisors (26655828425693).

66437738404131 is a wasteful number, since it uses less digits than its factorization.

66437738404131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13919492730.

The product of its (nonzero) digits is 24385536, while the sum is 57.

The spelling of 66437738404131 in words is "sixty-six trillion, four hundred thirty-seven billion, seven hundred thirty-eight million, four hundred four thousand, one hundred thirty-one".