66616475470231 has 16 divisors (see below), whose sum is σ = 67224981542400. Its totient is φ = 66011592053088.

The previous prime is 66616475470213. The next prime is 66616475470243. The reversal of 66616475470231 is 13207457461666.

It is a cyclic number.

It is not a de Polignac number, because 66616475470231 - 2¹³ = 66616475462039 is a prime.

It is a super-2 number, since 2×66616475470231² (a number of 28 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 (66616475470211) 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, 36594940 + ... + 38372158.

It is an arithmetic number, because the mean of its divisors is an integer number (4201561346400).

Almost surely, 2^{66616475470231} is an apocalyptic number.

66616475470231 is a deficient number, since it is larger than the sum of its proper divisors (608506072169).

66616475470231 is a wasteful number, since it uses less digits than its factorization.

66616475470231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1778238.

The product of its (nonzero) digits is 30481920, while the sum is 58.

The spelling of 66616475470231 in words is "sixty-six trillion, six hundred sixteen billion, four hundred seventy-five million, four hundred seventy thousand, two hundred thirty-one".