650172664 has 8 divisors (see below), whose sum is σ = 1219073760. Its totient is φ = 325086328.

The previous prime is 650172661. The next prime is 650172673. The reversal of 650172664 is 466271056.

It is a happy number.

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650172661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40635784 + ... + 40635799.

It is an arithmetic number, because the mean of its divisors is an integer number (152384220).

Almost surely, 2^650172664 is an apocalyptic number.

It is an amenable number.

650172664 is a deficient number, since it is larger than the sum of its proper divisors (568901096).

650172664 is a wasteful number, since it uses less digits than its factorization.

650172664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81271589 (or 81271585 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 650172664 is about 25498.4835627533. The cubic root of 650172664 is about 866.3158002472.

The spelling of 650172664 in words is "six hundred fifty million, one hundred seventy-two thousand, six hundred sixty-four".