66701933503920 has 480 divisors, whose sum is σ = 271658796724224. Its totient is φ = 14444812339200.

The previous prime is 66701933503867. The next prime is 66701933503949. The reversal of 66701933503920 is 2930533910766.

66701933503920 is a `hidden beast` number, since 6 + 6 + 7 + 0 + 19 + 33 + 503 + 92 + 0 = 666.

It is a super-2 number, since 2×66701933503920² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7257324 + ... + 13640843.

Almost surely, 2^{66701933503920} is an apocalyptic number.

66701933503920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66701933503920 is an abundant number, since it is smaller than the sum of its proper divisors (204956863220304).

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

66701933503920 is a wasteful number, since it uses less digits than its factorization.

66701933503920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20898241 (or 20898232 counting only the distinct ones).

The product of its (nonzero) digits is 5511240, while the sum is 54.

The spelling of 66701933503920 in words is "sixty-six trillion, seven hundred one billion, nine hundred thirty-three million, five hundred three thousand, nine hundred twenty".