651660536 has 8 divisors (see below), whose sum is σ = 1221863520. Its totient is φ = 325830264.

The previous prime is 651660523. The next prime is 651660547. The reversal of 651660536 is 635066156.

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

It is a super-2 number, since 2×651660536² = 849322908359614592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 651660536.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40728776 + ... + 40728791.

It is an arithmetic number, because the mean of its divisors is an integer number (152732940).

Almost surely, 2^651660536 is an apocalyptic number.

It is an amenable number.

651660536 is a deficient number, since it is larger than the sum of its proper divisors (570202984).

651660536 is a wasteful number, since it uses less digits than its factorization.

651660536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81457573 (or 81457569 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 651660536 is about 25527.6425860282. The cubic root of 651660536 is about 866.9761299855.

The spelling of 651660536 in words is "six hundred fifty-one million, six hundred sixty thousand, five hundred thirty-six".