61006566 has 16 divisors (see below), whose sum is σ = 122634864. Its totient is φ = 20231904.

The previous prime is 61006559. The next prime is 61006571. The reversal of 61006566 is 66560016.

It is a super-2 number, since 2×61006566² = 7443602190224712, which contains 22 as substring.

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, 24625 + ... + 26988.

It is an arithmetic number, because the mean of its divisors is an integer number (7664679).

Almost surely, 2^61006566 is an apocalyptic number.

61006566 is an abundant number, since it is smaller than the sum of its proper divisors (61628298).

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

61006566 is a wasteful number, since it uses less digits than its factorization.

61006566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51815.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 61006566 is about 7810.6700096727. The cubic root of 61006566 is about 393.6638418693.

The spelling of 61006566 in words is "sixty-one million, six thousand, five hundred sixty-six".