61420566 has 16 divisors (see below), whose sum is σ = 122929344. Its totient is φ = 20458824.

The previous prime is 61420547. The next prime is 61420571. The reversal of 61420566 is 66502416.

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, 8461 + ... + 13943.

It is an arithmetic number, because the mean of its divisors is an integer number (7683084).

Almost surely, 2^61420566 is an apocalyptic number.

61420566 is an abundant number, since it is smaller than the sum of its proper divisors (61508778).

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

61420566 is a wasteful number, since it uses less digits than its factorization.

61420566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 61420566 is about 7837.1274074115. The cubic root of 61420566 is about 394.5523230216.

The spelling of 61420566 in words is "sixty-one million, four hundred twenty thousand, five hundred sixty-six".