661469534 has 16 divisors (see below), whose sum is σ = 1139374080. Its totient is φ = 284843160.

The previous prime is 661469527. The next prime is 661469551. The reversal of 661469534 is 435964166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790814 + ... + 791649.

It is an arithmetic number, because the mean of its divisors is an integer number (71210880).

Almost surely, 2^661469534 is an apocalyptic number.

661469534 is a deficient number, since it is larger than the sum of its proper divisors (477904546).

661469534 is a wasteful number, since it uses less digits than its factorization.

661469534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582495.

The product of its digits is 466560, while the sum is 44.

The square root of 661469534 is about 25719.0500213363. The cubic root of 661469534 is about 871.3044833767.

The spelling of 661469534 in words is "six hundred sixty-one million, four hundred sixty-nine thousand, five hundred thirty-four".