61620566 has 16 divisors (see below), whose sum is σ = 106444800. Its totient is φ = 26206440.

The previous prime is 61620547. The next prime is 61620593. The reversal of 61620566 is 66502616.

It is a Curzon number.

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, 14966 + ... + 18633.

It is an arithmetic number, because the mean of its divisors is an integer number (6652800).

Almost surely, 2^61620566 is an apocalyptic number.

61620566 is a deficient number, since it is larger than the sum of its proper divisors (44824234).

61620566 is a wasteful number, since it uses less digits than its factorization.

61620566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33739.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 61620566 is about 7849.8768143201. The cubic root of 61620566 is about 394.9801111601.

The spelling of 61620566 in words is "sixty-one million, six hundred twenty thousand, five hundred sixty-six".