661152102 has 32 divisors (see below), whose sum is σ = 1454326272. Its totient is φ = 199101984.

The previous prime is 661152077. The next prime is 661152103. The reversal of 661152102 is 201251166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661152103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86508 + ... + 93839.

It is an arithmetic number, because the mean of its divisors is an integer number (45447696).

Almost surely, 2^661152102 is an apocalyptic number.

661152102 is an abundant number, since it is smaller than the sum of its proper divisors (793174170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661152102 is a wasteful number, since it uses less digits than its factorization.

661152102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180412.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 661152102 is about 25712.8781352847. The cubic root of 661152102 is about 871.1650845761.

The spelling of 661152102 in words is "six hundred sixty-one million, one hundred fifty-two thousand, one hundred two".