61566479 has 8 divisors (see below), whose sum is σ = 69792240. Its totient is φ = 53839296.

The previous prime is 61566473. The next prime is 61566487. The reversal of 61566479 is 97466516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61566479 - 2¹² = 61562383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61566473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124382 + ... + 124875.

It is an arithmetic number, because the mean of its divisors is an integer number (8724030).

Almost surely, 2^61566479 is an apocalyptic number.

61566479 is a deficient number, since it is larger than the sum of its proper divisors (8225761).

61566479 is a wasteful number, since it uses less digits than its factorization.

61566479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249289.

The product of its digits is 272160, while the sum is 44.

The square root of 61566479 is about 7846.4309721045. The cubic root of 61566479 is about 394.8645136997.

The spelling of 61566479 in words is "sixty-one million, five hundred sixty-six thousand, four hundred seventy-nine".