669764243064 has 32 divisors (see below), whose sum is σ = 1913612123520. Its totient is φ = 191361212256.

The previous prime is 669764243041. The next prime is 669764243081. The reversal of 669764243064 is 460342467966.

It is a junction number, because it is equal to n+sod(n) for n = 669764242995 and 669764243013.

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, 1993345794 + ... + 1993346129.

It is an arithmetic number, because the mean of its divisors is an integer number (59800378860).

Almost surely, 2^669764243064 is an apocalyptic number.

It is an amenable number.

669764243064 is an abundant number, since it is smaller than the sum of its proper divisors (1243847880456).

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

669764243064 is a wasteful number, since it uses less digits than its factorization.

669764243064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986691939 (or 3986691935 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 57.

The spelling of 669764243064 in words is "six hundred sixty-nine billion, seven hundred sixty-four million, two hundred forty-three thousand, sixty-four".