66700400674000 has 40 divisors (see below), whose sum is σ = 161281568834568. Its totient is φ = 26680160268800.

The previous prime is 66700400673943. The next prime is 66700400674031. The reversal of 66700400674000 is 47600400766.

It can be written as a sum of positive squares in 4 ways, for example, as 97239196224 + 66603161477776 = 311832^2 + 8161076^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16675098169 + ... + 16675102168.

Almost surely, 2^{66700400674000} is an apocalyptic number.

It is an amenable number.

66700400674000 is an abundant number, since it is smaller than the sum of its proper divisors (94581168160568).

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

66700400674000 is a wasteful number, since it uses less digits than its factorization.

66700400674000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33350200360 (or 33350200344 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 66700400674000 in words is "sixty-six trillion, seven hundred billion, four hundred million, six hundred seventy-four thousand".