661070376 has 32 divisors (see below), whose sum is σ = 1836307200. Its totient is φ = 220356720.

The previous prime is 661070353. The next prime is 661070383. The reversal of 661070376 is 673070166.

661070376 is a `hidden beast` number, since 6 + 610 + 7 + 0 + 37 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 661070376.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530040 + ... + 1530471.

It is an arithmetic number, because the mean of its divisors is an integer number (57384600).

Almost surely, 2^661070376 is an apocalyptic number.

It is an amenable number.

661070376 is an abundant number, since it is smaller than the sum of its proper divisors (1175236824).

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

661070376 is a wasteful number, since it uses less digits than its factorization.

661070376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060526 (or 3060516 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 661070376 is about 25711.2888825123. The cubic root of 661070376 is about 871.1291877573.

The spelling of 661070376 in words is "six hundred sixty-one million, seventy thousand, three hundred seventy-six".