661630062475 has 12 divisors (see below), whose sum is σ = 820637125416. Its totient is φ = 529164793280.

The previous prime is 661630062469. The next prime is 661630062481. The reversal of 661630062475 is 574260036166.

It is an interprime number because it is at equal distance from previous prime (661630062469) and next prime (661630062481).

It is a de Polignac number, because none of the positive numbers 2^k-661630062475 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3384442 + ... + 3574591.

It is an arithmetic number, because the mean of its divisors is an integer number (68386427118).

Almost surely, 2^661630062475 is an apocalyptic number.

661630062475 is a deficient number, since it is larger than the sum of its proper divisors (159007062941).

661630062475 is a wasteful number, since it uses less digits than its factorization.

661630062475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6962846 (or 6962841 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 661630062475 in words is "six hundred sixty-one billion, six hundred thirty million, sixty-two thousand, four hundred seventy-five".