620034664 has 8 divisors (see below), whose sum is σ = 1162565010. Its totient is φ = 310017328.

The previous prime is 620034661. The next prime is 620034671. The reversal of 620034664 is 466430026.

It can be written as a sum of positive squares in only one way, i.e., 447322500 + 172712164 = 21150^2 + 13142^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (620034661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38752159 + ... + 38752174.

Almost surely, 2^620034664 is an apocalyptic number.

It is an amenable number.

620034664 is a deficient number, since it is larger than the sum of its proper divisors (542530346).

620034664 is a wasteful number, since it uses less digits than its factorization.

620034664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77504339 (or 77504335 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 620034664 is about 24900.4952561189. The cubic root of 620034664 is about 852.7177894614.

The spelling of 620034664 in words is "six hundred twenty million, thirty-four thousand, six hundred sixty-four".