51660658 has 64 divisors (see below), whose sum is σ = 99590400. Its totient is φ = 19595520.

The previous prime is 51660649. The next prime is 51660667. The reversal of 51660658 is 85606615.

It is an interprime number because it is at equal distance from previous prime (51660649) and next prime (51660667).

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 285328 + ... + 285508.

It is an arithmetic number, because the mean of its divisors is an integer number (1556100).

Almost surely, 2^51660658 is an apocalyptic number.

51660658 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

51660658 is a deficient number, since it is larger than the sum of its proper divisors (47929742).

51660658 is a wasteful number, since it uses less digits than its factorization.

51660658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 51660658 is about 7187.5349042631. The cubic root of 51660658 is about 372.4374214351.

The spelling of 51660658 in words is "fifty-one million, six hundred sixty thousand, six hundred fifty-eight".