669777672594 has 32 divisors (see below), whose sum is σ = 1382880950784. Its totient is φ = 216039479040.

The previous prime is 669777672593. The next prime is 669777672601. The reversal of 669777672594 is 495276777966.

It is not an unprimeable number, because it can be changed into a prime (669777672593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2211162 + ... + 2495754.

It is an arithmetic number, because the mean of its divisors is an integer number (43215029712).

Almost surely, 2^669777672594 is an apocalyptic number.

669777672594 is an abundant number, since it is smaller than the sum of its proper divisors (713103278190).

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

669777672594 is a wasteful number, since it uses less digits than its factorization.

669777672594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297282.

The product of its digits is 1680315840, while the sum is 75.

The spelling of 669777672594 in words is "six hundred sixty-nine billion, seven hundred seventy-seven million, six hundred seventy-two thousand, five hundred ninety-four".