661472094 has 8 divisors (see below), whose sum is σ = 1322944200. Its totient is φ = 220490696.

The previous prime is 661472087. The next prime is 661472113. The reversal of 661472094 is 490274166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

661472094 is an admirable number.

It is a super-2 number, since 2×661472094² = 875090662281489672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 55122669 + ... + 55122680.

It is an arithmetic number, because the mean of its divisors is an integer number (165368025).

Almost surely, 2^661472094 is an apocalyptic number.

661472094 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

661472094 is a wasteful number, since it uses less digits than its factorization.

661472094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110245354.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 661472094 is about 25719.0997898449. The cubic root of 661472094 is about 871.3056074076.

The spelling of 661472094 in words is "six hundred sixty-one million, four hundred seventy-two thousand, ninety-four".