66637022112 has 96 divisors (see below), whose sum is σ = 198025248960. Its totient is φ = 21793224960.

The previous prime is 66637022069. The next prime is 66637022171. The reversal of 66637022112 is 21122073666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-4 number, since 4×66637022112⁴ (a number of 44 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681814 + ... + 773397.

It is an arithmetic number, because the mean of its divisors is an integer number (2062763010).

Almost surely, 2^66637022112 is an apocalyptic number.

It is an amenable number.

66637022112 is an abundant number, since it is smaller than the sum of its proper divisors (131388226848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66637022112 is a wasteful number, since it uses less digits than its factorization.

66637022112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455283 (or 1455269 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

Adding to 66637022112 its reverse (21122073666), we get a palindrome (87759095778).

The spelling of 66637022112 in words is "sixty-six billion, six hundred thirty-seven million, twenty-two thousand, one hundred twelve".