66574751040 has 224 divisors, whose sum is σ = 268412732160. Its totient is φ = 15217072128.

The previous prime is 66574751029. The next prime is 66574751053. The reversal of 66574751040 is 4015747566.

66574751040 is a `hidden beast` number, since 6 + 6 + 57 + 47 + 510 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 489907 + ... + 610866.

Almost surely, 2^66574751040 is an apocalyptic number.

66574751040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66574751040 is an abundant number, since it is smaller than the sum of its proper divisors (201837981120).

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

66574751040 is a wasteful number, since it uses less digits than its factorization.

66574751040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100806 (or 1100790 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 66574751040 in words is "sixty-six billion, five hundred seventy-four million, seven hundred fifty-one thousand, forty".