664612377770 has 64 divisors (see below), whose sum is σ = 1373898533760. Its totient is φ = 228931660800.

The previous prime is 664612377761. The next prime is 664612377773. The reversal of 664612377770 is 77773216466.

It is a super-2 number, since 2×664612377770² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664612377773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35355494 + ... + 35374286.

It is an arithmetic number, because the mean of its divisors is an integer number (21467164590).

Almost surely, 2^664612377770 is an apocalyptic number.

664612377770 is an abundant number, since it is smaller than the sum of its proper divisors (709286155990).

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

664612377770 is a wasteful number, since it uses less digits than its factorization.

664612377770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35751.

The product of its (nonzero) digits is 12446784, while the sum is 56.

The spelling of 664612377770 in words is "six hundred sixty-four billion, six hundred twelve million, three hundred seventy-seven thousand, seven hundred seventy".