664577740410015 has 32 divisors (see below), whose sum is σ = 1088057518073856. Its totient is φ = 346197154343040.

The previous prime is 664577740410011. The next prime is 664577740410029. The reversal of 664577740410015 is 510014047775466.

It is a happy number.

It is not a de Polignac number, because 664577740410015 - 2² = 664577740410011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664577740410011) 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, 157484757 + ... + 161649633.

It is an arithmetic number, because the mean of its divisors is an integer number (34001797439808).

Almost surely, 2^{664577740410015} is an apocalyptic number.

664577740410015 is a deficient number, since it is larger than the sum of its proper divisors (423479777663841).

664577740410015 is a wasteful number, since it uses less digits than its factorization.

664577740410015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412319.

The product of its (nonzero) digits is 19756800, while the sum is 57.

The spelling of 664577740410015 in words is "six hundred sixty-four trillion, five hundred seventy-seven billion, seven hundred forty million, four hundred ten thousand, fifteen".