664860354755 has 16 divisors (see below), whose sum is σ = 799533587424. Its totient is φ = 530754888960.

The previous prime is 664860354751. The next prime is 664860354793. The reversal of 664860354755 is 557453068466.

664860354755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664860354755 - 2² = 664860354751 is a prime.

It is a super-2 number, since 2×664860354755² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664860354694 and 664860354703.

It is not an unprimeable number, because it can be changed into a prime (664860354751) 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, 7702697 + ... + 7788533.

It is an arithmetic number, because the mean of its divisors is an integer number (49970849214).

Almost surely, 2^664860354755 is an apocalyptic number.

664860354755 is a deficient number, since it is larger than the sum of its proper divisors (134673232669).

664860354755 is a wasteful number, since it uses less digits than its factorization.

664860354755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89126.

The product of its (nonzero) digits is 72576000, while the sum is 59.

The spelling of 664860354755 in words is "six hundred sixty-four billion, eight hundred sixty million, three hundred fifty-four thousand, seven hundred fifty-five".