661151562 has 16 divisors (see below), whose sum is σ = 1322788320. Its totient is φ = 220302992.

The previous prime is 661151549. The next prime is 661151563. The reversal of 661151562 is 265151166.

It is not an unprimeable number, because it can be changed into a prime (661151563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113 + ... + 36380.

It is an arithmetic number, because the mean of its divisors is an integer number (82674270).

Almost surely, 2^661151562 is an apocalyptic number.

661151562 is an abundant number, since it is smaller than the sum of its proper divisors (661636758).

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

661151562 is a wasteful number, since it uses less digits than its factorization.

661151562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40437.

The product of its digits is 10800, while the sum is 33.

The square root of 661151562 is about 25712.8676347077. The cubic root of 661151562 is about 871.1648473995.

The spelling of 661151562 in words is "six hundred sixty-one million, one hundred fifty-one thousand, five hundred sixty-two".