61624657 has 8 divisors (see below), whose sum is σ = 65837600. Its totient is φ = 57508704.

The previous prime is 61624649. The next prime is 61624679. The reversal of 61624657 is 75642616.

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 61624657 - 2³ = 61624649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61624357) 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, 22932 + ... + 25477.

It is an arithmetic number, because the mean of its divisors is an integer number (8229700).

Almost surely, 2^61624657 is an apocalyptic number.

61624657 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

61624657 is a deficient number, since it is larger than the sum of its proper divisors (4212943).

61624657 is a wasteful number, since it uses less digits than its factorization.

61624657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48495.

The product of its digits is 60480, while the sum is 37.

The square root of 61624657 is about 7850.1373873328. The cubic root of 61624657 is about 394.9888518992.

The spelling of 61624657 in words is "sixty-one million, six hundred twenty-four thousand, six hundred fifty-seven".