65403660 has 48 divisors (see below), whose sum is σ = 209293056. Its totient is φ = 14949312.

The previous prime is 65403659. The next prime is 65403677. The reversal of 65403660 is 6630456.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77442 + ... + 78281.

It is an arithmetic number, because the mean of its divisors is an integer number (4360272).

Almost surely, 2^65403660 is an apocalyptic number.

65403660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65403660 is an abundant number, since it is smaller than the sum of its proper divisors (143889396).

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

65403660 is a wasteful number, since it uses less digits than its factorization.

65403660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155742 (or 155740 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 65403660 is about 8087.2529328567. The cubic root of 65403660 is about 402.9031697036.

The spelling of 65403660 in words is "sixty-five million, four hundred three thousand, six hundred sixty".