666680740734 has 8 divisors (see below), whose sum is σ = 1333361481480. Its totient is φ = 222226913576.

The previous prime is 666680740699. The next prime is 666680740787. The reversal of 666680740734 is 437047086666.

It is a sphenic number, since it is the product of 3 distinct primes.

666680740734 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55556728389 + ... + 55556728400.

It is an arithmetic number, because the mean of its divisors is an integer number (166670185185).

Almost surely, 2^666680740734 is an apocalyptic number.

666680740734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

666680740734 is a wasteful number, since it uses less digits than its factorization.

666680740734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111113456794.

The product of its (nonzero) digits is 24385536, while the sum is 57.

The spelling of 666680740734 in words is "six hundred sixty-six billion, six hundred eighty million, seven hundred forty thousand, seven hundred thirty-four".