66667067400 has 96 divisors (see below), whose sum is σ = 218824878240. Its totient is φ = 16732124160.

The previous prime is 66667067351. The next prime is 66667067413. The reversal of 66667067400 is 476076666.

It is a super-2 number, since 2×66667067400² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66667067400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3257794 + ... + 3278193.

It is an arithmetic number, because the mean of its divisors is an integer number (2279425815).

Almost surely, 2^66667067400 is an apocalyptic number.

66667067400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66667067400 is an abundant number, since it is smaller than the sum of its proper divisors (152157810840).

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

66667067400 is a wasteful number, since it uses less digits than its factorization.

66667067400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536023 (or 6536014 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 48.

The spelling of 66667067400 in words is "sixty-six billion, six hundred sixty-seven million, sixty-seven thousand, four hundred".