660415490 has 64 divisors (see below), whose sum is σ = 1514246400. Its totient is φ = 201885696.

The previous prime is 660415489. The next prime is 660415493. The reversal of 660415490 is 94514066.

It is a super-2 number, since 2×660415490² = 872297238863880200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 660415490.

It is not an unprimeable number, because it can be changed into a prime (660415493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8006 + ... + 37214.

It is an arithmetic number, because the mean of its divisors is an integer number (23660100).

Almost surely, 2^660415490 is an apocalyptic number.

660415490 is an abundant number, since it is smaller than the sum of its proper divisors (853830910).

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

660415490 is a wasteful number, since it uses less digits than its factorization.

660415490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29259.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 660415490 is about 25698.5503482200. The cubic root of 660415490 is about 870.8414328182.

The spelling of 660415490 in words is "six hundred sixty million, four hundred fifteen thousand, four hundred ninety".