61421566 has 16 divisors (see below), whose sum is σ = 97401600. Its totient is φ = 28968408.

The previous prime is 61421453. The next prime is 61421573. The reversal of 61421566 is 66512416.

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, 5701 + ... + 12463.

It is an arithmetic number, because the mean of its divisors is an integer number (6087600).

Almost surely, 2^61421566 is an apocalyptic number.

61421566 is a deficient number, since it is larger than the sum of its proper divisors (35980034).

61421566 is a wasteful number, since it uses less digits than its factorization.

61421566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7023.

The product of its digits is 8640, while the sum is 31.

The square root of 61421566 is about 7837.1912060380. The cubic root of 61421566 is about 394.5544642706.

The spelling of 61421566 in words is "sixty-one million, four hundred twenty-one thousand, five hundred sixty-six".