56167661 has 4 divisors (see below), whose sum is σ = 61273824. Its totient is φ = 51061500.

The previous prime is 56167627. The next prime is 56167673. The reversal of 56167661 is 16676165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56167661 - 2⁶ = 56167597 is a prime.

It is a super-2 number, since 2×56167661² = 6309612284421842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56167861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2553065 + ... + 2553086.

It is an arithmetic number, because the mean of its divisors is an integer number (15318456).

Almost surely, 2^56167661 is an apocalyptic number.

It is an amenable number.

56167661 is a deficient number, since it is larger than the sum of its proper divisors (5106163).

56167661 is a wasteful number, since it uses less digits than its factorization.

56167661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106162.

The product of its digits is 45360, while the sum is 38.

The square root of 56167661 is about 7494.5087230585. The cubic root of 56167661 is about 382.9676703754.

The spelling of 56167661 in words is "fifty-six million, one hundred sixty-seven thousand, six hundred sixty-one".