102661564 has 6 divisors (see below), whose sum is σ = 179657744. Its totient is φ = 51330780.

The previous prime is 102661561. The next prime is 102661607. The reversal of 102661564 is 465166201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102661561) by changing a digit.

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, 12832692 + ... + 12832699.

Almost surely, 2^102661564 is an apocalyptic number.

It is an amenable number.

102661564 is a deficient number, since it is larger than the sum of its proper divisors (76996180).

102661564 is a wasteful number, since it uses less digits than its factorization.

102661564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25665395 (or 25665393 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 102661564 is about 10132.2043011380. The cubic root of 102661564 is about 468.2408420191.

The spelling of 102661564 in words is "one hundred two million, six hundred sixty-one thousand, five hundred sixty-four".